+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   357825 (2005 UA55) Classification: Main-belt Asteroid          SPK-ID: 2357825 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2979984221947813 6.98e-08   a 2.760243962649607 3.0701e-08 au q 1.937695616907353 1.9103e-07 au i 15.09188966085438 7.0068e-06 deg node 31.91182042967101 1.7186e-05 deg peri 299.7673656625539 2.0672e-05 deg M 110.4949988633066 1.5117e-05 deg tp 2458486.385620711060 (2019-Jan-02.88562071) 6.5046e-05 TDB period 1675.018584080736 4.59 2.7946e-05 7.651e-08 d yr n .2149229885694499 3.5858e-09 deg/d Q 3.582792308391861 3.985e-08 au   Orbit Determination Parameters    # obs. used (total)      328      data-arc span      5750 days (15.74 yr)      first obs. used      2004-04-22      last obs. used      2020-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48653      source      ORB      producer      Otto Matic      solution date      2020-Feb-26 00:32:56   Additional Information  Earth MOID = .977667 au   Jupiter MOID = 2.02642 au   T_jup = 3.228  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.7   n/a MPO503412   diameter diameter 4.437 km 1.382 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.043   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   357825 (2005 UA55)          Discovered 2005-Oct-23 by CSS at Catalina Reference: 20130327/Numbers.arc Last Updated: 2013-03-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-24 16:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin